Metal-shearing machine.



No. 736,536 PATENTED AUG. 18, 1903, O. MODONNER.

METAL SHEARING MACHINE.

APPLICATION FILED D110. 28, 1901.

N0 MODEL Nrrn STATES Patented August 18, 1903.

PATENT. GFFICE.

CI-IARLEY MCDONNER, OF W'AUSAUKEE, \VISCONSIN, ASSIGNOR TO JOSEPHHRBAOEK, OF BESSEMER, MICHIGAN.

METAL-SHEARlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 736,536, dated August18, 1903.

Application filed December 28, 1901- Serial No. 87,602. (No model.)

To all whom it may concern.-

Be it known that I, OHARLEY MODONNER, a citizen of the UnitedStates,residing at Wausaukee, in the county of Marinette and State whenworn, and also knives of difierent sizes and shapes may be convenientlyfitted to the device whenever desired, and also to guard against lateraldisplacement or expansion of the die under the pressure of theshearingblade.

Another object is to provide for the convenient application and removalof the shearing-blade to the knife-bar and also to prevent looseness ofthe blade thereof.

Another object is to provide an improved construction between theoperating-handle and the knife-bar, so as to reduce the frictiontherebetween to the minimum, and thereby to materially facilitate theoperation of the machine.

Another object is to provide for conveniently holding bolts, rods, andthe like upon the die of the machine, so as to obviate displacementthereof. under the action of the shearing-blade, and thereby to obviatethe necessity for holding the work by hand upon the die of the machine.

With these and other objects in view the presentinvention consists inthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accompanying drawings,and particularlypoin ted out in the appended claims, it being understood that changes inthe form, proportion, size, and minor details may be made within thescope of the claims without departing from the spirit or sacrificing anyof the advantages of the invention.

In the drawings, Figure 1 is a perspective view of a metal-shearingmachine embodying the present invention. Fig. 2 isa longitudinalsectional view thereof. Fig. 3 is a crosssectional view taken on theline 3 3 of Fig. 2. Fig. 4 is a detail perspective View of one of themembers or sections of the die.

Like characters of reference designate corresponding-parts in all thefigures of the drawings.

In carrying out the present invention there is provided a body or casing1, which is provided with opposite side and rear laterallyprojectedperforate ears 2 for the reception of suitable fastenings 3, whereby thedevice may be firmly secured to a bench or other suitable support.Throughout the greater portion of the body there is provided alongitudinal slot or opening 4, which opens out through the top andbottom of the body and terminates adjacent to the opposite ends thereof.The front of the body has'its upper portion cut away, so as to form afixed jaw 5, above which the front end of the body projects, so as toprovide an upstanding ledge or shoulder 6, and at the rear of the jawthe sides of the body are extended upwardly a suitable distance, so asto form bearing ears or portions '7, between which the handle of themachine is to be mounted. That portion of the slot or opening 4 whichextends into the fixed jaw 5 is reduced in width, as indicated at 4 soas to increase the width of the opposite portions of the jaw, andthereby strengthen the same.

The die of the machine is formed in two separate longitudinal sections 8and 9, each of which is of inverted-L shape in cross'section, therebypresenting a flat base 10, having a pendent longitudinal flange 11 atthe 0 outer edge of said base. The die-sections are applied to the fixedjaw from the opposite sides thereof, so that the base and flangeportions may snugly embrace the top and outer sides of the jaw, and thesections are of a length to fit snugly between the ledge or shoulders 6and the front ends of the respective ears 7, said front ends beinginclined upwardly and outwardly, so as to overhang the die-sections, andthe rear ends of the latter I00 being beveled to correspond to theinclination of the ears, whereby the latter serve to prevent accidentalupward displacement of the sections. As indicated in Fig. 3 of thedrawings, it will be noted that each die-section isof a width to haveits inner edge lie flush with the adjacent edge of the slot or openingin the fixed jaw, and one of these sections is provided at its forwardend and upon its inner edge with a spacing-block 12 to lie against theinner edge of the other diesection. Suitable screw fastenings 13 are setthrough the flanges of the die-sections and into the fixed jaw, so as todetachably hold the die to the machine, and thereby permit ofreplacement of the die when worn or when it is desired to use adifferent character of die.

Within the slot or opening of the body is mounted a vertically-swingingknife-bar 14, which has its rear end supported upon a suitable pivot-pin15, passing through the oppo site sides of the body, while its forwardend is projected in front of the upstanding ear portions 7, so as tooverhang the slot or opening in the die. In the under edge of the outerfree end of the knife-bar there is provided a longitudinal groove 16,which opens outwardly through the outer end of the bar and into which isfitted a knife-blade 17,

which is held in place by means of screws or suitable fastenings 18, setthrough one side of the knife-bar and into the blade. It is preferred tohave the knife-receiving groove open through the outer end of the bar inorder that the knife-blade may be thrust longitudinally into the groove,as this manner of inserting the blade is very convenient andexpeditious. After the blade has been fitted in place a stop-plate orcross-bar 19 is placed over the open or outer end of the groove andconnected to the knife-bar by means of fastenings 20, it of course beingunderstood that the rear end of the blade abuts the rear end of thegroove, and therefore the blade is effectually held against endwisemovement, and thereby maintained rigidly upon the knife-bar. The freeend of the knife-bar is normally and yieldably held in an elevatedposition by means ofa spring-tongue 21, which lies within thelongitudinal opening of the body and has its lower end connected to apin or cross-bar 22, set through the opposite sides of the body near thebottom thereof. The intermediate portion of the spring passes overanother pin or cross-bar 23, so as to hold the spring inclined upwardlyand outwardly with its upper free end'bearing against the under side ofthe knife-bar. For the purpose of forcing the knife-bar downwardly, soas to thrust the blade through the opening in the die, there is providedan operating-handle 24, having a cam or segmental head 25, which ispivoted between th upper end portions of the ears 7, as indicated at 26,whereby its rounded lower end is disposed in frictional engagement withthe upper edge of the knife? bar, and by rocking the handle in eitherdirection from the upright position of the handle the knife-bar will bemoved downwardly wee-53s with a powerful force. ward movementof theknife-bar and to prevent the same from striking the die, there isprovided a stop therefor in the nature of a pin or cross-bar 27,piercing the opposite sides of the body and located above and in rear ofthe die, so that the under side of the knifebar will strike against thispin, and thereby be limited in its downward movement. To reduce thefriction between the operatinghandle and the knife, the cam-surfacethereof is provided with a plurality of concaved sockets or seats 28, inwhich are loosely fitted antifriction-balls 29, which latter are held inplace by means of a metallic plate or-ball-retaining device 30, which isfastened to the cam edge of the handle and provided with perforations31, corresponding to the sockets and slightly less in diameter than thediameter of the respective balls, whereby the latter are adapted toproject through the perforations and bear upon the upper edge of theknife-bar, thereby materially reducing the friction of the bar and thehandle. Although not shown in the drawings, it will of course beunderstood that antifriction-rollers may be employed instead of balls.

In the operation of the device it will be understood that the work to becut is placed upon the die so as to lie across the opening therein andbeneath the shear or knife blade,.

as indicated in dotted lines in Fig. 2 of the drawings, so that when theknife bar is forced downwardly the blade will he forced against thework, so as to cooperate with the edges of the opening or slot in thedie, and

thereby sever the work with a shear out. It will here be noted, as bestshown in Fig. 3 of the drawings, that the upper face of the die isrounding transversely'or beveled inwardly and upwardly from its oppositesides for the purpose of securing the maximum shearing effect of theedges of the opening in the die. By fitting the die between theupstanding ledge or shoulder 6 and the front ends of the sides of thebody of the machine any tendency of the die to move or extend in anendwise direction under the pressure of the knife-blade is effectivelyovercome. By making the die in opposite longitudinal sections it ispossible to apply and remove the samelaterally without first removingthe handie and knife-bar. A

For convenience in holding a metal bar upon the die during the cuttingoperation there is provided a hook-shaped work-holder com-- prising ashank 32, pivoted externally to one side of the body and having itsforward free end projected in front of the bearing-ears 7 andprovided'at'its outer free end with a pendent bill or hooked portion 33,which is adapted to be swung downwardly over a rod and into engagementwith the top of the die, thereby to snugly hold the rod between thehooked portion 33 and the front ends of the ears, whereby the rod or baris prevented from being pushed laterally outward by, and

To limit thedownthereby escape the cutting action of, the knife-blade.It is thus obvious that after this work-holder has been engaged with thework it is not necessary to hold the latter by hand, whereby both handsof the operator are free for manipulating the handle of the machine. 7

What I claim is 1. In a metal-working machine, the combination with abody having a fixed jaw, of a Vertically-swingingknife-blade, andaremovable die supported upon the jaw and having opposite substantiallyvertical flanges snugly embracing the opposite sides of the fixed jawand detachably secured thereto, the die also having a longitudinal slotwhich is open at the inner end thereof for the reception of theknife-blade.

2. In a metal-working machine, the combination with a body havingtransverselyalined upstanding spaced side portions, a fixed jawprojected in front of and at the bottom of said portions and provided atits outer end with an upstanding transverse ledge or flange, of aremovable die supported upon the jaw and fitted snugly between the ledgeor flange and the upstanding side portions of the body, and providedwith pendent flanges snugly embracing the opposite sides of the jaw,thedie also having a longitudinal slot,detachable fastenings connecting theflanges of the die to the jaw, and a vertically-swinging knife-blademounted between the upstanding side portions of the body and incooperative relation with the slot of the die.

3. In a metal-Working machine, the combination with a fixed jaw or basehaving an upstanding transverse ledge or shoulder at the outer edgethereof, of a removable die made in separate longitudinal sections whichare of inverted substantially L shape in cross-section and snuglyembrace the top and respective side edges of the jaw and also abutagainst the inner side of the flange or shoulder, and independentdetachable connections between the respective die-sections and the jaw.

4. In a metal-working machine, the combination with a body having afixed jaw which is provided at its outer end with an upstandingtransverse ledge or flange, of a vertically-swinging knife-blade incooperative relation with the jaw, a removable die made in separatelongitudinal sections which are of inverted substantially l..- shape incrosssection and snugly embrace the top and respective side edges of thejaw and also abut against the inner side of the flange or shoulder, theinner edges of the die-sections being separated by a longitudinalinterspace forming knife-blade, of a die made in separate oppositesections which are fitted to the top of the base or jaw, and aspacing-block carried by the forward end of the inner edge of one of thedie-sections to bear against the other section and space the twosections to form a longitudinal slot to receive the knifeblade.

6. In a metal-working machine, the combination with a body having a die,of a vertically-movable knife-bar having its under side provided with alongitudinal groove which opens through one end of the bar, a knifebladefitted snugly in the groove, and a plate or cross-bar removably securedacross and closing the open outer end of the groove to prevent endwisemovement of the blade.

7. In a metal-working machine, the combination with avertically-swinging knife-bar, of an operating device therefor embodyinga vertically-swinging pivoted cam in frictional engagement with the topof the knifebar, the lower active surface of the cam being provided witha plurality of concaved sockets or seats, antifriction-balls looselymounted in the seats, and a retaining-plate secured to the activesurface of the cam and provided with perforations corresponding to andslightly less in diameter than the antifriction-balls, whereby thelatter are retained in their seats and project through the perforationsinto frictional engagement with the knife-bar.

8. In a metal-working machine, the combination with a base or bodyhaving a longitudinal slot, a fixed jaw projected at the forward endthereof and provided with a longitudinal slot, a ledge or shoulderrising from the outer end of the jaw, opposite upstanding side portionsrising at the rear end of the jaw, inverted substantially L-shaped diemembers embracing opposite sides of the jaw and fitted snugly betweenthe ledge or shoulder and the upstanding side portions of the body,dotachable fastenings piercing the sides of the die members and engagingthe fixed jaw, a knife-bar pivoted within the slotted portion of thebody and having its outer free end working over the slotted portion ofthe die, the under side of the free end of the bar being provided with agroove opening through its outer end, a knife-blade fitted endwise intothe groove, a stop-plate detachably secured across the open outer end ofthe groove, a spring held within the body and bearing upwardly againstthe knife-bar to yieldably elevate the same, and a handled operating-campivoted between the upstanding portions of the body and in frictionaloperative engagement with the upper side of the knife-bar.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in H. G. LAUN, GERTRUDE RILEY.

